I do agree that I don't think the 90 day notice route will be taken.
However, small issue about the next strike being unprotected really should be investigated by future strikers. Didn't BA already tell Unite that they think they are putting their members at risk by potentially striking again? If the ballot returns a 'No' then I suspect that this point will be re-iterated to Unite.
Could BA survive and operate a full schedule if they did go to the extreme and dismiss future strikers. Would a threat of possible dismissal put off a few more hundred people from striking, leaving 2-3000 CC being shown the door. I think I am right when I say that BA cannot replace dismissed strikers for a period of 3 months.